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Unlike GOP presidential primary seasons of the past, the one that begins in Iowa Tuesday was actually designed to slow down the emergence of a winner by stretching out the calendar and altering the delegate allocation rules. It will take until March 24 to allocate a bare majority of the delegates.

At a meeting of 6,000 mathematicians in Boston, a reporter finds people dancing, crocheting, knitting and using theater to explore and celebrate their discipline.

ADHD drugs like Ritalin don't pose a big risk of dangerous cardiovascular problems, according to new research. But the risk could still be doubled for the 2.7 million children taking stimulant drugs to treat the symptoms of attention deficit-hyperactivity disorder.

Both conservative and liberal groups are preparing to monitor the Nov. 6 elections. They're all looking to report any transgressions they may see on Election Day.

The central bank also says it likely won't be switching gears and nudging interest rates higher until at least 2014. Fed Chairman Ben Bernanke concedes its longer-term forecasts are "a best guess."

Seven others were shot when a gunman opened fire at a psychiatric clinic at the University of Pittsburgh Medical Center.

Some schools, looking to cut costs, are intrigued by so-called robo-readers, computer programs that grade students' writing and offer feedback. Some teachers find the programs helpful in the classroom, but skeptics say they're not always the best judge of writing ability.

One of the highest-profile political matchups of the season is playing out in Virginia, where former governors with powerful friends and big-money backing are battling for an open U.S. Senate seat. The dead-heat matchup pits Democrat Tim Kaine, 54, against Republican George Allen, 60.

Rising water temperatures and increasing ocean acidity can kill coral reefs. But a new study finds that dead reefs can potentially recover from catastrophes if ocean temperatures stabilize. Some scientists say the resiliency of coral reef may be the key to their survival.

A law meant to outlaw lying about military honors was struck down 6-3 by the Supreme Court. The court says the law, known as the Stolen Valor Act, was written so broadly that it infringes on free speech. Some of the justices suggested that the law could be rewritten to focus only on those who lie about military awards in order to gain benefit.